Bug#944481: exim4: [Dummy bug] Enforce longer testing period for new upstream

[Andreas Metzler]

Source: exim4
Version: 4.93~RC2-1
Severity: serious

One of 4.93's changes

|----------------
| JH/32 Introduce a general tainting mechanism for values read from the
|       input channel, and values derived from them. Refuse to expand any
|       tainted values, to catch one form of exploit.
|----------------

has a relatively high potential for breaking stuff. Let's give this
version some additional time for testing sid and delay migration to
testing.

cu Andreas

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